WheelOffset

2009 BMW Z4 Wheel Offset

Quick specs

Wheel size
8x17 · 8x18 · 8x19
Offset
ET29
Backspacing
5.14 in
Bolt pattern
5×120
Center bore
72.6 mm
Thread
M12×1.5
Tire size
225/45R17 · 225/40R18 · 225/35R19

OEM configurations

ConfigurationFrontRearOffsetBackspacingTireBolt patternCenter boreThread
sDrive30i · 3.0L, N52B30, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive35i · 3.0L, N54B30, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive23i · 2.5L, N52B25A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive30i · 3.0L, N52B30A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive35i · 3.0L, N54B30A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive23i (ABA-LM25) · N52B25A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive35i (ABA-LM30) · N54B30A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5

Wheels and hardware

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Lug hardware

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  • White Knight Chrome M12x1.50 Bulge Acorn Lug Nut, 20 Count

    M12 x 1.5

    Matches M12 x 1.5 thread — confirm wheel seat style

    Check price on Amazon

  • White Knight 3807BK-20AM Black Chrome M12x1.50 Spline Lug Nut, 20 items

    M12 x 1.5

    Matches M12 x 1.5 thread — confirm wheel seat style

    Check price on Amazon

Wheel locks

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  • MCGARD Chrome Cone Seat M12 x 1.5 Wheel Locks

    M12 x 1.5 · lock

    Matches M12 x 1.5 — confirm seat style for your wheel

    Check price on Amazon

  • Gorilla Automotive Wheel Locks With Washer (M12x1.50)

    M12 x 1.5 · lock

    Matches M12 x 1.5 — confirm seat style for your wheel

    Check price on Amazon

Real-World 2009 BMW Z4 Wheel Setups

Observed aftermarket setups from documented Modified1 builds. These are individual build records — not OEM specifications and not clearance guarantees for every vehicle.

Common custom wheel sizes

Among builds in our database for this model year:

  • 18-inch — 1 documented build

1 documented build.

2009 BMW Z4 custom wheel setup

Staggered · 18×8.5 ET35 / Rear unknown

Documented on a 2009 BMW Z4 build — observed custom fitment, not a universal fit guarantee.

Wheel: BBS CH

Front
18×8.5 ET35 · 235/40R18
Rear
— · 255/35R18
Compared with OEM

Compared with the 17×8 ET29 OEM configuration. Calculated geometry only — not fit confirmation.

  • Outer edge 0.3 mm farther toward fender (more outward poke)
  • Inner edge 12.3 mm closer to suspension (less inner clearance)
  • Width +0.5" vs OEM
  • Diameter +1" vs OEM
View full build on Modified1

Compare your own setup

See how a different width or offset sits versus an OEM configuration for this year.

OEM: 17×8 ET29 · 225/45R17 · Front · sDrive30i · 3.0L, N52B30, I6, Petrol

  • Outer: +0 mm
  • Inner clearance: 0 mm unchanged

Open full fitment calculator

More specs for the 2009 BMW Z4

Each OEM row is a catalog configuration. Offset ranges are not collapsed when the database has exact setups. Documented aftermarket builds are observed setups only — not universal fit or clearance confirmation.